Sirex Woodwasp Identifying Characteristics: 1 – 1 ½” long Do not have narrow waists like many wasps Metallic blue-black color Females have orange legs.

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Presentation transcript:

Sirex Woodwasp Identifying Characteristics: 1 – 1 ½” long Do not have narrow waists like many wasps Metallic blue-black color Females have orange legs Males have orange in abdomen and black hind legs

Sirex Woodwasp Relationship between Fungus and Wasp Wasp injects toxic mucus + fungus into tree while depositing eggs Mucus kills tree cells and fungus eats dead cells Wasp eggs hatch and larvae feed on fungus Mature wasp exits tree and carries mucus and fungus to another tree 2

Sirex Woodwasp Common Host Trees White Pine Scots Pine North American Pines 3

4 Sirex Woodwasp Map – Range of Sirex Woodwasp

5 Sirex Woodwasp What to Look For 1.Small, round exit holes 2.Heavy needle fall and wilting 3.Progressive color changes at the top of the tree 4.Resin from egg-laying on branch and trunk 5.Brown fungal staining of sap wood

6 Sirex Woodwasp What to Look For 1.Small, round exit holes 2.Heavy needle fall and wilting 3.Progressive color changes at the top of the tree 4.Resin from egg-laying on branch and trunk 5.Brown fungal staining of sap wood

7 Sirex Woodwasp What to Look For 1.Small, round exit holes 2.Heavy needle fall and wilting 3.Progressive color changes at the top of the tree 4.Resin from egg-laying on branch and trunk 5.Brown fungal staining of sap wood

8 Sirex Woodwasp What to Look For 1.Small, round exit holes 2.Heavy needle fall and wilting 3.Progressive color changes at the top of the tree 4.Resin from egg-laying on branch and trunk 5.Brown fungal staining of sap wood

9 Sirex Woodwasp What to Look For 1.Small, round exit holes 2.Heavy needle fall and wilting 3.Progressive color changes at the top of the tree 4.Resin from egg-laying on branch and trunk 5.Brown fungal staining of sap wood

10 YEAR-ROUND: Heavy needle fall or wilting; Small, round exit holes. LATE FALL/ EARLY WINTER: Attacked trees have pale green, yellow or red needles at the top. LATE SUMMER/ EARLY FALL: Flight time for adults begins. Sirex Woodwasp What to Look For (cont.)

11 Sirex Woodwasp Additional Resources USDA dwasp.htm Don’t Move Firewood EDDMaps: Reporting App for Smartphones